father of Saladin, and a member of a family of Kurdish soldiers of fortune who in the 12th century took service under the Seljuq Turkish rulers in Iraq and Syria. Appointed governor of Damascus, Ayyūb and his brother Shīrkūh united Syria in preparation for war against the crusaders. He gave his name to the dynasty his son, Saladin, founded, the Ayyūbids (Ayyūbid dynasty).